Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. organic material

Anotations

Scope note:

A colorless, crystalline compound derived from the fractional distillation of coal tar and composed of three attached aromatic rings. It is used to make synthetic alizarin pigment, and to manufacture other organic dyes, resins, plasticizers, and tanning agents.